The president had insisted he did not want to put boots on the ground in the newly flaring conflict but now believes special forces are necessary to develop better intelligence on the Sunni insurgents should airstrikes be ordered.

Obama also wants an up-close assessment of the fighting strength and will of the Iraqi forces in and around Baghdad.

The president will not, we are told, present a prepackaged decision to congressional leaders but will instead seek consensus.

White House aides readily acknowledge the president will need political backing for this and any subsequent move he makes in Iraq.

Mehdi Army fighters march during a military-style training in Najaf, June 17, 2014. Officials say President Obama wants an up-close assessment of the fighting strength and will of the Iraqi forces.